The Rheem RTG20336Z Outdoor Manifold Assembly Kit is engineered for natural gas systems, featuring a gas proportional valve that optimizes performance and efficiency. This kit includes all necessary components for seamless installation, ensuring compatibility with Rheem tankless water heaters. Constructed from durable materials, it is designed to withstand outdoor conditions while maintaining reliable operation. The assembly is compliant with industry standards, providing assurance of safety and performance. Ideal for both new installations and replacements, this manifold kit enhances the functionality of your gas system.